<template>
  <div class="byted-weektime" @mousedown="dian" @mousemove="yi" @mouseup="li">
    <div class="calendar">
      <table class="calendar-table" style="width:610px">
        <thead class="calendar-head">
          <tr>
            <th rowspan="6" class="week-td">星期/时间</th>
            <!--
            <th colspan="24">00:00 - 12:00</th>
            <th colspan="24">12:00 - 24:00</th>
            -->
          </tr>
          <tr>
            <td v-for="(item,index) in tableHeader" :key="index.dictValue">{{item.dictLabel}}</td>
          </tr>
        </thead>
        <tbody id="tableBody">
          <div
            id="kuang"
            :style="{width:kuangObj.width+'px',height:kuangObj.height+'px',top:kuangObj.top+'px',left:kuangObj.left+'px',bottom:kuangObj.bottom+'px',right:kuangObj.right+'px'}"
          ></div>
          <tr>
            <td>星期一</td>
            <td
              @mousedown.prevent="handleMouseDown(i,0)"
              @mouseup.prevent="handleMouseUp(i,0)"
              class="calendar-atom-time"
              :class="item.class"
              v-for="(item,i) in rowUnit[0]"
              :key="i"
            ></td>
          </tr>
          <tr>
            <td>星期二</td>
            <td
              @mousedown.prevent="handleMouseDown(i,1)"
              @mouseup.prevent="handleMouseUp(i,1)"
              class="calendar-atom-time"
              :class="item.class"
              v-for="(item,i) in rowUnit[1]"
              :key="i"
            ></td>
          </tr>
          <tr>
            <td>星期三</td>
            <td
              @mousedown.prevent="handleMouseDown(i,2)"
              @mouseup.prevent="handleMouseUp(i,2)"
              class="calendar-atom-time"
              :class="item.class"
              v-for="(item,i) in rowUnit[2]"
              :key="i"
            ></td>
          </tr>
          <tr>
            <td>星期四</td>
            <td
              @mousedown.prevent="handleMouseDown(i,3)"
              @mouseup.prevent="handleMouseUp(i,3)"
              class="calendar-atom-time"
              :class="item.class"
              v-for="(item,i) in rowUnit[3]"
              :key="i"
            ></td>
          </tr>
          <tr>
            <td>星期五</td>
            <td
              @mousedown.prevent="handleMouseDown(i,4)"
              @mouseup.prevent="handleMouseUp(i,4)"
              class="calendar-atom-time"
              :class="item.class"
              v-for="(item,i) in rowUnit[4]"
              :key="i"
            ></td>
          </tr>
          <tr>
            <td>星期六</td>
            <td
              @mousedown.prevent="handleMouseDown(i,5)"
              @mouseup.prevent="handleMouseUp(i,5)"
              class="calendar-atom-time"
              :class="item.class"
              v-for="(item,i) in rowUnit[5]"
              :key="i"
            ></td>
          </tr>
          <tr>
            <td>星期日</td>
            <td
              @mousedown.prevent="handleMouseDown(i,6)"
              @mouseup.prevent="handleMouseUp(i,6)"
              class="calendar-atom-time"
              :class="item.class"
              v-for="(item,i) in rowUnit[6]"
              :key="i"
            ></td>
          </tr>

          <tr>
            <td colspan="4" class="td-table-tip">
              <div class="clearfix">
                <span class="pull-left tip-text">请用鼠标点选上课时间</span>
                <a @click="clear" class="pull-right">清空</a>
              </div>
            </td>
          </tr>
          <tr>
            <td colspan="4" class="timeContent">
              <div v-for="(item,index) in timeStr" :key="index" v-show="item.length">
                <span>{{weekDate[index+1]}}:</span>
                <strong>
                  <span>{{item}}</span>
                </strong>
              </div>
            </td>
          </tr>
        </tbody>
      </table>
    </div>
    <!-- 鼠标的画框的效果 -->
    <div
      id="container"
      v-bind:style="{backgroundColor:back,
            height:h+'px',
            width:w+'px',
            position:'absolute',
            left:left+'px',
            top:top+'px',
            opacity:0.2,
            border:len+'px dashed #000',
            zIndex:-1}"
    ></div>
  </div>
</template>

<script>
import { parse } from 'path-to-regexp';
export default {
  name: "weekTimeSelect",
  props: {
    data: {
      type: Array,
    },
  },
  data() {
    return {
      tableHeader: [
        //{label: "上午", value: '0'},
        //{label: "下午", value: '1'},
        //{label: "晚上", value: '2'},
      ], // 从字典中取数据
      weekDate: {
        "1": "星期一",
        "2": "星期二",
        "3": "星期三",
        "4": "星期四",
        "5": "星期五",
        "6": "星期六",
        "7": "星期日"
      },
      rowUnit: [], //每一个单元格
      timeContent: [], //选中的时间段原始数据
      timeSection: [], //时间段，可以返回给后台的数据
      timeStr: [], //时间段，前端显示的数据
      beginDay: 0,
      beginTime: 0,
      downEvent: false,
      kuangObj: {
        width: 0,
        height: 0,
        top: 0,
        left: 0,
        bottom: 0,
        right: 0,
        oldLeft: 0,
        oldTop: 0,
        flag: false
      },
      py: "",
      px: "",
      back: "#31676f",
      h: "",
      w: "",
      top: "",
      left: "",
      len: 0
    };
  },
  created() {
    this.init();
    this.getDicts("edu_schedule_segment").then(response => {
      this.tableHeader = JSON.parse(JSON.stringify(response.data));
    });
  },
  mounted() {},
  methods: {
    init() {
      for (let i = 0; i < 7; i++) {
        let arr = [];
        for (let j = 0; j < 3; j++) {
          arr.push({ class: null, timeData: j });
        }
        this.rowUnit.push(arr);
        this.timeContent.push({ arr: [] });
        this.timeSection.push([]);
        this.timeStr.push("");
      }

      // 初始化之前的数据
        this.initSelectData()
    },
    initSelectData() {
      if(this.data && null !== this.data) {
        this.data.forEach(t => {
          let x = t.weekDay, y = parseInt(t.scheduleSegment)
          this.rowUnit[x-1][y].class = "ui-selected"; // 下标比星期几少1
        })
      }
    },
    handleMouseDown(i, day) {
      this.downEvent = true; //按下时鼠标不在范围内则不算
      this.beginDay = day;
      this.beginTime = i;
    },
    dian(event) {
      // console.log(event);
      this.px = event.pageX; //获取x坐标
      this.py = event.pageY;
    },
    yi(event) {
      if (this.px == "" || this.py == "") {
        return;
      }
      var px1 = this.px;
      var px2 = this.py;
      this.left = event.pageX;
      this.top = event.pageY;
      this.h = this.top - this.py;
      this.w = this.left - this.px;
      var hc = -this.h;
      var wc = -this.w;
      this.len = 1;
      this.back = "#31676f";
      if (this.h < 0 && this.w >= 0) {
        // console.log(1);
        this.h = hc;
        this.left = px1;
      } else if (this.h >= 0 && this.w < 0) {
        // console.log(2);
        this.w = wc;
        this.top = px2;
      } else if (this.h < 0 && this.w < 0) {
        // console.log(3);
        this.h = hc;
        this.w = wc;
      } else {
        // console.log(4);
        this.left = this.px;
        this.top = this.py;
      }
      if (this.w < 0) {
        this.w = 0 - this.w;
      }
      if (this.h < 0) {
        this.h = 0 - this.h;
      }
    },
    li() {
      this.px = "";
      this.py = "";
      this.h = "";
      this.w = "";
      this.top = "";
      this.left = "";
      this.len = 0;
      this.back = "";
    },
    handleMouseUp(i, day) {
      let _this = this;
      let begin = this.beginTime;
      let start = begin <= i ? begin : i; //x轴 起点
      let length = Math.abs(begin - i);
      let end = start + length; //x轴 终点

      let dayStart = this.beginDay <= day ? this.beginDay : day; //y轴 起点
      let dayLength = Math.abs(this.beginDay - day);
      let dayEnd = dayStart + dayLength; //y轴 终点

      //当框选范围内所有块都是选中状态时,执行反选
      function isAdd() {
        for (let x = dayStart; x < dayEnd + 1; x++) {
          for (let y = start; y < end + 1; y++) {
            if (_this.rowUnit[x][y].class == null) return true;
          }
        }
        return false;
      }
      //当点击事件是在table内才触发选取数据操作
      if (this.downEvent) {
        //选时间段
        if (isAdd()) {
          //没选中的全都选上
          for (let x = dayStart; x < dayEnd + 1; x++) {
            for (let y = start; y < end + 1; y++) {
              if (this.rowUnit[x][y].class == null) {
                this.rowUnit[x][y].class = "ui-selected";
                this.timeContent[x].arr.push(this.rowUnit[x][y].timeData);
              }
            }
          }
        } else {
          //反选
          for (let x = dayStart; x < dayEnd + 1; x++) {
            for (let y = start; y < end + 1; y++) {
              if (this.rowUnit[x][y].class == "ui-selected") {
                this.rowUnit[x][y].class = null;
                var c = this.rowUnit[x][y].timeData;
                var kong = "";
                for (let i = 0; i < this.timeContent[x].arr.length; i++) {
                  if (c == this.timeContent[x].arr[i]) {
                    kong = i;
                  }
                }
                //console.log(kong);
                this.timeContent[x].arr.splice(kong, 1);
              }
            }
          }
        }

        // 选完之后回调函数
        this.returnData()

        //过滤时间段,将临近的时间段合并
        //this.filterTime(dayStart, dayEnd);
      }
      this.downEvent = false;
    },
    returnData() {
       this.$emit('return-data',this.rowUnit);
    },
    /* 这个是取时间的东西，咱不需要
    filterTime(start, end) {
      //选中的x,y坐标信息 x:0-47  y:0-6
      function sortCut(arr) {
        //提取连续的数字
        var result = [];
        arr.forEach(function(v, i) {
          var temp = result[result.length - 1];
          if (!i) {
            result.push([v]);
          } else if (v % 1 === 0 && v - temp[temp.length - 1] == 1) {
            temp.push(v);
          } else {
            result.push([v]);
          }
        });
        return result;
      }
      function toStr(num) {
        if (Number.isInteger(num)) {
          let str = num < 10 ? "0" + num : num.toString();
          return str + ":00";
        } else {
          let str =
            Math.floor(num) < 10
              ? "0" + Math.floor(num)
              : Math.floor(num).toString();
          return str + ":30";
        }
      }
      function timeToStr(arr) {
        //把数组转成方便人看到字符串
        let str = "";
        arr.forEach((arr, index) => {
          let str1 = "";
          if (index == 0) {
            str1 = toStr(arr[0]) + "~" + toStr(arr[1]);
          } else {
            str1 = " , " + toStr(arr[0]) + "~" + toStr(arr[1]);
          }
          str += str1;
        });

        return str;
      }
      //排序,分割成
      for (let i = start; i < end + 1; i++) {
        let arr1 = sortCut(this.timeContent[i].arr.sort((a, b) => a - b));
        let arr2 = [];
        arr1.forEach(arr => {
          //转成带小数点的时间段,以及供前端显示的字符串
          let arr3 = [];
          arr3.push(arr[0] / 2);
          arr3.push(arr[arr.length - 1] / 2 + 0.5);
          arr2.push(arr3);
        });
        this.timeStr[i] = timeToStr(arr2);
        this.timeSection[i] = arr2;
      }
      // console.log(this.timeSection)
    },
    */
    clear() {
      this.rowUnit.forEach(item => {
        item.forEach(item1 => {
          item1.class = null;
        });
      });
      this.timeContent.forEach(item => {
        item.arr = [];
      });
      this.timeSection.forEach(item => {
        //赋值成空数组[]出问题
        item.length = 0;
      });
      //遍历赋值成'',不管用
      this.timeStr.length = 0;
      for (let i = 0; i < 7; i++) {
        this.timeStr.push("");
      }
      //this.initState = true
    },
  }
};
</script>

<style scoped>
.byted-weektime .calendar {
  -webkit-user-select: none;
  position: relative;
  display: inline-block;
}
#tableBody {
  /* position: relative; */
}
/*.byted-weektime .calendar .schedule{background:#2F88FF;width:0;height:0;position:fixed;display:none;top:0;left:0;pointer-events:none;-webkit-transition:all 400ms ease;-moz-transition:all 400ms ease;-ms-transition:all 400ms ease;transition:all 400ms ease}*/
.byted-weektime .calendar .calendar-table {
  border-collapse: collapse;
  border-radius: 4px;
}
.byted-weektime .calendar .calendar-table tr .calendar-atom-time:hover {
  background: #ccc;
}
.byted-weektime .calendar .calendar-table tr .ui-selected {
  background: #2f88ff;
}
.byted-weektime .calendar .calendar-table tr .ui-selected:hover {
  background: #2f88ff;
}
.byted-weektime .calendar .calendar-table tr,
.byted-weektime .calendar .calendar-table td,
.byted-weektime .calendar .calendar-table th {
  border: 1px solid #ccc;
  font-size: 12px;
  text-align: center;

  line-height: 1.8em;
  -webkit-transition: background 200ms ease;
  -moz-transition: background 200ms ease;
  -ms-transition: background 200ms ease;
  transition: background 200ms ease;
}
.byted-weektime .calendar .calendar-table tbody tr {
  height: 30px;
}
.byted-weektime .calendar .calendar-table tbody tr td:first-child {
  background: #f8f9fa;
}
.byted-weektime .calendar .calendar-table thead th,
.byted-weektime .calendar .calendar-table thead td {
  background: #f8f9fa;
}
.byted-weektime .calendar .calendar-table .td-table-tip {
  line-height: 2.4em;
  padding: 0 12px 0 19px;
  background: #fff !important;
}
.byted-weektime .calendar .calendar-table .td-table-tip .clearfix {
  height: 46px;
  line-height: 46px;
}
.byted-weektime .calendar .calendar-table .td-table-tip .pull-left {
  font-size: 14px;
  color: #333333;
}
.byted-weektime .week-td {
  width: 75px;
  padding: 20px 0;
}
.byted-weektime a {
  cursor: pointer;
  color: #2f88ff;
  font-size: 14px;
}
#kuang {
  position: absolute;
  background-color: blue;
  opacity: 0.3;
}
</style>